Paid add-ons in what respect? Advertising and links to them, or hosting them here?
If the latter, I will be totally against it, as if a coder goes MIA (it has happened before so don't think it may never again) it will be down to the staff to fix security issues and bugs with it...
And if the hack has a security flaw inherant in it and the coder isn't MIA, we'll have to get a fix sorted out and it's extra hassle we don't need - If you want to have paid add-ons hosted I won't support that...
If you can clear that up for me before I decide to vote MPDev
Chris